Using the GUI, the estimation output is overwritten in the Gretl assemblage in the Windows taskbar if an alternative specification is chosen, including estimation results , graphs of model fit and forecast . On the other hand ARIMA option (and for that matter OLS estimation) retains all model variant outputs and graphs for inspection and comparison. While I realise the output, graphs et can be saved, this really is not necessary in the process of model selection where a visual inspection is more efficient and less time consuming. Any chance this can be rectified? Brian Professor Emeritus Agricultural and Food Economics Harper Adams University Newport Shropshire TF10 8NB Tel 01952 815237 Tel: +44 1952 728153 Mbl +44 7976 538712 University: +44 1952 815235 alt: email: bjrevell(a)harper-adams.ac.uk